双基推进剂组分和螺压工艺参数对CL-20晶型的影响研究

Study on the Influence of Double-base Propellant Ingredients and Screw-extrusion Processing Parameters on CL-20 Crystal Phase

为阐明推进剂螺压工艺过程中CL-20晶型是否发生变化的问题,通过采用傅里叶变换拉曼(FTR)光谱表征CL-20晶型,试验研究了双基推进剂组分和螺压工艺参数对CL-20晶型的影响。结果表明:CL-20与增塑剂二硝酸乙酯硝基胺(DINA)、三乙酸甘油酯(TA)、邻苯二甲酸二乙酯(DEP)的混合物在60℃水中加热1h后,CL-20没有发生晶型转变;在80℃水中加热1h后,CL-20的ε晶型全部转变为α晶型。CL-20与双基黏合剂、苯二酸铅或水杨酸铜的混合物在60℃或80℃水中加热1h后,均未发生晶型转变;并且,螺压工艺(吸收、压延和压伸)过程中未观察到CL-20晶型转变。

In order to clarify whether CL-20 crystal phase transition may happen in screw-extrusion process of the propellant, Fourier transform Raman(FTR) spectroscopy was used to characterize CL-20 crystal phase, then the effects of double-base propellant ingredients and screw-extrusion process parameters on CL-20 crystal phase were experimentally studied.The results show that the ε-CL-20 crystal phase has not transformed after the mixtures of CL-20 and N-nitro-digydroxyethylamiedinitrate(DINA), diethylphthalate(DEP) or triacetin(TA) heated in 60℃ water for 1h, but transformed into α-CL-20 in 80℃water. The CL-20 crystal phase has not transformed after the mixtures of CL-20 and double-base binder, lead benzoate or copper salicylate heated whether in 60℃ or 80℃ water for 1h. Meanwhile, no crystal phase transition in CL-20 is observed during the screw-extrusion process(absorption, calendering and press stretching).